#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>

#pragma pack(1)
struct S
{
    char c1;//1 1 1
    int i;  //4 1 1
    char c2;//1 1 1
};
#pragma pack()


int main()
{
    printf("%zd\n", sizeof(struct S));

    return 0;
}